A locally-constructed family planning questionnaire and a series of personality instruments were administered to 100 sexually active, unmarried, undergraduate students (60 females, 40 males). Responses to a question of "whose responsibility is it for using birth control measures" showed that 80% of the women and 83% of the men see that responsibility as being shared equally by both partners. The women, however, assumed significantly more of that responsibility than did the men in the study. Seven of the available personality measures were related to the responsibility for birth control for women, while only one such relationship was significant for the men. An equal sharing of responsibility by the women is related to a set of traits which includes being expedient, self-assured, independent, assertive, well-adjusted, non-neurotic, and venturesome. (Author)